On 04/23, Lorenzo Bianconi wrote:
> In the current implementation if the program is dev-bound to a specific
> device, it will not be possible to perform XDP_REDIRECT into a DEVMAP
> or CPUMAP even if the program is running in the driver NAPI context and
> it is not attached to any map entry. This seems in contrast with the
> explanation available in bpf_prog_map_compatible routine.
> Fix the issue introducing __bpf_prog_map_compatible utility routine in
> order to avoid bpf_prog_is_dev_bound() check running bpf_check_tail_call()
> at program load time (bpf_prog_select_runtime()).
> Continue forbidding to attach a dev-bound program to XDP maps
> (BPF_MAP_TYPE_PROG_ARRAY, BPF_MAP_TYPE_DEVMAP and BPF_MAP_TYPE_CPUMAP).
>
> Fixes: 3d76a4d3d4e59 ("bpf: XDP metadata RX kfuncs")
> Signed-off-by: Lorenzo Bianconi <[email protected]>
Acked-by: Stanislav Fomichev <[email protected]>
Thank you!
